Great point. I couldn't agree more. When it comes to trichome production and terpenes, etc., it's SO much more a matter of strain selection and much, MUCH less to do with the light.
By the way, there's a new MIGRO vid up on YouTube where he addresses the difference between a couple different UVA fixtures. One is fluorescent and one is LED....Turns out the fluorescent is more efficient! PLUS, he mentions that he's not sure about the longevity of the UVA diodes -indicating they might not be very long-lived. That would be a bummer if true because I imagine it might not even be cost effective to replace burnt diodes...wheras a fluorescent tube would be easy to replace. I'd probably lean towards the fluorescent tubes at this point in time.